/Engine/Source/Runtime/Core/Public/Containers/UnrealString.h
Lexicographically tests how this string compares to the Other given string
0 if equal, negative if less than, positive if greater than
int32 Compare ( const [FString](API\Runtime\Core\Containers\FString) & Other, [ESearchCase::Type](API\Runtime\Core\Misc\ESearchCase__Type) SearchCase ) const